1999 PONTIAC BONNEVILLE wiring

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2-15 Remote Trunk Release Lockout (Option)
The trunk release lockout
switch in the trunk allows
you to secure items in
the trunk.
By pressing the left side of the valet switch, the remote
trunk release button below the driver's door armrest will
be disabled. Push the right side of the valet switch to
enable the remote trunk release button to work again.
Trunk Security Override (Option)
Pressing the trunk symbol on the remote keyless entry
transmitter opens the trunk even if the remote trunk
release lockout switch is activated.
Trunk Lid
CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You can't see or smell
CO. It can cause unconsciousness and even death.
If you must drive with the trunk lid open or if
electrical wiring or other cable connections must
pass through the seal between the body and the
trunk lid:
1. Make sure all other windows are shut.
2. Turn the fan on your heating or cooling
system to its highest speed with the
setting on ECON or VENT. That will
force outside air into your vehicle. See
ªComfort Controlsº in the Index.
3. If you have air outlets on or under the
instrument panel, open them all the way.
See ªEngine Exhaustº in the Index.

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2-65 Safety Belt Reminder Light
When the key is turned to RUN or START, a chime will
come on for about eight seconds to remind people to
fasten their safety belts.
The safety belt light will
also come on and stay on
for about 70 seconds. If the
driver's belt is already
buckled, neither the chime
nor the light will come on.
Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel, which shows AIR BAG. The system checks the
air bag's electrical system for malfunctions. The light
tells you if there is an electrical problem. The system
check includes the air bag sensors, the air bag modules,
the wiring and the crash sensing and diagnostic module.
For more information on the air bag system, see ªAir
Bagº in the Index.
This light will come on
when you start your engine,
and it will flash for a few
seconds. Then the light
should go out. This means
the system is ready.
If the air bag readiness light stays on after you start the
engine or comes on when you are driving, your air bag
system may not work properly. Have your vehicle
serviced right away.
The air bag readiness light should flash for a few
seconds when you turn the ignition key to RUN. If the
light doesn't come on then, have it fixed so it will be
ready to warn you if there is a problem.

First Edition for Pontiac Bonneville Owner's Manual ± 1999
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4-37
When you're turning with a trailer, make wider turns
than normal. Do this so your trailer won't strike soft
shoulders, curbs, road signs, trees or other objects.
Avoid jerky or sudden maneuvers. Signal well
in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle may need a
different turn signal flasher and/or extra wiring. Check
with your dealer. The arrows on your instrument panel
will flash whenever you signal a turn or lane change.
Properly hooked up, the trailer lamps will also flash,
telling other drivers you're about to turn, change lanes
or stop.
When towing a trailer, the arrows on your instrument
panel will flash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind you
are seeing your signal when they are not. It's important
to check occasionally to be sure the trailer bulbs are
still working.
Your vehicle has bulb warning lights. When you plug a
trailer lighting system into your vehicle's lighting
system, its bulb warning lights may not let you know if
one of your lamps goes out. So, when you have a trailer lighting system plugged in,
be sure to check your vehicle and trailer lamps from
time to time to be sure they're all working. Once you
disconnect the trailer lamps, the bulb warning lights
again can tell you if one of your vehicle lamps is out.
Driving On Grades
Reduce speed and shift to a lower gear before you start
down a long or steep downgrade. If you don't shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.
Parking on Hills
CAUTION:
You really should not park your vehicle, with a
trailer attached, on a hill. If something goes
wrong, your rig could start to move. People can
be injured, and both your vehicle and the trailer
can be damaged.

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6-41
4. Lift up on both plastic side flaps at the same time
(driver's side shown) and lift the assembly out.
5. Carefully let go of the decklid and let it raise
completely. The assembly will still be connected to
the wiring harness, but now you will have access to
the bulbs.6. Turn the bulb assembly counterclockwise to
remove it.

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6-61
Electrical System
Add-On Electrical Equipment
NOTICE:
Don't add anything electrical to your vehicle unless
you check with your dealer first. Some electrical
equipment can damage your vehicle and the
damage wouldn't be covered by your warranty.
Some add
-on electrical equipment can keep other
components from working as they should.
Your vehicle has an air bag system. Before attempting to
add anything electrical to your vehicle, see ªServicing
Your Air Bag
-Equipped Vehicleº in the Index.
Headlamp Wiring
The headlamp wiring is protected by an internal circuit
breaker. An electrical overload will cause the lamps
to go on and off, or in some cases to remain off.
If this happens, have your headlamp system checked
right away.
Windshield Wipers
The windshield wiper motor is protected by an internal
circuit breaker and a fuse. If the motor overheats due to
heavy snow, etc., the wiper will stop until the motor
cools. If the overload is caused by some electrical
problem, be sure to have it fixed.
Power Windows and Other Power Options
Circuit breakers in the fuse panel protect the power
windows and other power accessories. When the current
load is too heavy, the circuit breaker opens and closes,
protecting the circuit until the problem is fixed or
goes away.

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6-62 Maxifuse

/Relay Center
To check the fuses in this underhood fuse center, turn
the two knobs one
-quarter turn counterclockwise and
loosen the metal wing nut on the passenger's side of the
cover. Then remove the cover. The inside of the cover
has a chart that explains the features and controls
governed by each fuse and relay.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses, circuit breakers
and fusible thermal links. This greatly reduces the
chance of damage caused by electrical problems.
Look at the silver
-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical size
and rating.
If you ever have a problem on the road and don't have a
spare fuse, you can borrow one that has the same
amperage. Just pick some feature of your vehicle that
you can get along without
-- like the radio or cigarette
lighter
-- and use its fuse, if it is the correct amperage.
Replace it as soon as you can.
There are two fuse blocks in your vehicle: the driver's
side and passenger's side fuse blocks.

First Edition for Pontiac Bonneville Owner's Manual ± 1999
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9-5
First Gear, Automatic Transaxle 2-27 . . . . . . . . . . . . . . . . . . .
Flashers, Hazard Warning 5-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Flash-to-Pass Feature 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flat Tire, Changing 5-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Capacities 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluids and Lubricants 7-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Lamps 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign Countries, Fuel 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
French Language Manual ii. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 6
-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canada 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Lock 6-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Release 6-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Container 6-9 . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gage 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and Circuit Breakers 6-62 . . . . . . . . . . . . . . . . . . . . . . .
Gages
Boost 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Coolant Temperature 2-69 . . . . . . . . . . . . . . . . . . . .
Engine Oil Pressure 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speedometer 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAWR 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Positions, Automatic Transaxle 2-24 . . . . . . . . . . . . . . . .
Glove Box 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graphic Equalizer 3-17, 3-23 . . . . . . . . . . . . . . . . . . . . . . . . .
Gross Axle Weight Rating 4-30 . . . . . . . . . . . . . . . . . . . . . . . .
Gross Vehicle Weight Rating 4-30 . . . . . . . . . . . . . . . . . . . . . .
Guide en Fran†ais ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GVWR 4
-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halogen Bulbs 6-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Warning Flashers 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Restraints 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamps 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High/Low Beam Changer 2-38 . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head-Up Display 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hearing Impaired, Customer Assistance 8-5 . . . . . . . . . . . . . .
Heating 3-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Beam Headlamps 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . .
Highway Hypnosis 4-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill and Mountain Roads 4-23 . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches, Trailer 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood
Checking Things Under 6
-9 . . . . . . . . . . . . . . . . . . . . . . . . .
Release 6-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood Ajar Message 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HUD 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydroplaning 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Positions 2-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transaxle Lock Check 7-35 . . . . . . . . . . . . . . . . . . . .
Illuminated Entry 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inadvertent Load Protection 2-48 . . . . . . . . . . . . . . . . . . . . . . .
Inflation, Tire 6-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflator, Air 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Day/Night Rearview Mirror 2-48 . . . . . . . . . . . . . . . . .

First Edition for Pontiac Bonneville Owner's Manual ± 1999
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9-12
Underbody Flushing Service 7-35 . . . . . . . . . . . . . . . . . . . . .
Underbody Maintenance 6-58 . . . . . . . . . . . . . . . . . . . . . . . . .
Universal Theft-Deterrent System 2-17 . . . . . . . . . . . . . . . . . .
Vehicle
Control 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage Warnings iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions 6
-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification Number 6-60 . . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation System 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visor Vanity Mirrors 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visors, Sun 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltmeter 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Devices 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Lights, Gages and Indicators 2-64 . . . . . . . . . . . . . . .
Warranty Information 8-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid Message 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid, Windshield 6-28 . . . . . . . . . . . . . . . . . . . . . . . .
Washing Your Vehicle 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrips 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wheel
Alignment 6
-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nut Torque 5-27, 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Express-Down 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Washer 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Level Check 7-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Wipers 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Replacement 6-43 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter Driving 4-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blade Check 7-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blades, Cleaning 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring, Headlamp 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrecker Towing 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench, Wheel 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .